Process Control

Process Control

Project management is the core of project successful, so we will have engineers who have strong back ground of mold technology and experience in communicate with overseas customer to make it.

Process Control-1        

Project Running Flow Chart

1. RFQ stage

Offer initinal professional scenario (like cavity amount, runner system , type of steel) and best price based on your requirement ( like mold life, volume , budget).

2. DFM / Mold design stage

Offer more detailed drawings according to the part design and offer the best solution for you.

3. Machining and assembling stage

Coordinate all the resource to meet the T1 time and get qualified samples.

4. Mold trial stage

Make sure the qualified samples arrive your hand on time and optimize the mold just finished.

5. Delivery stage

Make sure the mass production can be run on time in your factory.


The following defects associated with the plastic injection moulding processes are some of the potential issues we look  from mould design to mould trial stage:

Gas marks (burning)

Gas or burn marks are small, dark or black spots on the part surface. Air trapped in pockets may compress, heat up and cause burn marks. Strategically locating air vents of the proper depth within the mold is the best way to avoid burn marks. Adjustments injection speed and screw speed can also be altered to reduce or eliminate marks.

Short shots

A short shot is the incomplete filling of a mould cavity which results in the production of an incomplete part. Changing the plastic injection moulding parameters can correct this.

Weld Lines

Weld Lines are created when two or more melt flow fronts meet possibly causing a visible line. It can also create a weakened area in the finished moulded part. Adjusting moulding parameters such as injection pressure, temperature and speed can help avoid this problem.


Moulding flash occurs when a thin layer of material is forced out of the mold cavity at the parting line or ejector pins location. The machine clamp force must be greater than the pressure in the cavity, to sufficiently hold the mould plates shut and the mould must be properly built and maintained to avoid this problem.

Sink Marks

Sink marks are caused by localised shrinkage of the material at thick sections without sufficient compensation when the part is cooling. Parts designed with a consistent wall thickness are less prone to this issue. Adjusting moulding parameters such as injection pressure and time can often minimise the effect of the sink mark.

Flow marks

Flow marks may result if molten plastic does not properly flow as it fills the cavity. Changing moulding parameters or adjusting the mould by changing the gate location or size can usually eliminate this problem.


Bubbles may flow along the part surface during the plastic injection moulding process. The trapped air can cause incomplete filling and packing, and will often cause a surface blemish in the final part. Correct mold design and processing parameters can prevent splay.